/Engine/Plugins/Runtime/MeshModelingToolset/Source/MeshModelingTools/Public/EditMeshPolygonsTool.h
Assign planar-projection UVs to mesh
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(CallInEditor, Category=UVs, Meta=(DisplayName="PlanarProjection", DisplayPriority=11)) void PlanarProjection()